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ILPEYERS. PHOTO-LITHUGRQPHER, WASHINGTON. D. C

@with initiateur fait) Letters Patent N'o.- 79,183, dated June 23, 1868.

IMPROVEMENT vnv PROPELLBRS..

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TO ALLWHOM IT MAY CONCERN: l

Be it k'nown that I, ROBERT A'rKIN, of Brooklyn, in the county of Iings,and .State of New York, have invented certain new and usefulImprovements in Propelling Vesselsi and I do hereby declare that thefollowing is n full clear, and exact description thereof, which willenable others skilled in the art to make and u seV the same, referencebeing hadto the accompanying drawings, forming `a part of thisspecification, in which--A Figure 1 is a plan view ot' my invention,when thepropeller is operated bya chain-belt, or `its equivalent,- theview being taken from a section Athrough iig. 3. i i .i

Figure 2 is a similar view, when an eccentric-rod and crank areemployed.

vFigure is a side view of the invention, taken fronitig. 1'. l Figure 4is a side view 'of the invention, when the propeller is raised from thewater.

Similar letters of reference indicate corresponding parts.V Y p Thisinventionrrelates to certain improvements in'the` method ofpropellingvessels, chiefly intended to be used as an auxiliary power tosailing-vessels. Y l i,

I propose to apply to the sides of the vessels (at that` part wherepaddle-wheels are usually placed,) screwpropellers, which are setinbearingsl in frames hinged or jointed to the sides ofthe vessel, andcapable of being lraised or lowered from lthe bulwarks by means oflifting or suspending-chains, workedby a windlass or other equivalentgear. The frames are also held by supporting-chains from the bulwarks,the lifting-chains being hung from the davits. The frames contain screwsor Propellers, driven by endless chains, and whelped bosses on theshaftsf or the shafts may be actuated by toothed gearing, in either caseworked by steam-power, then chains or shafts passing through the sidesof the vessel.' One or more screws may be plaoed'on each side ofthevessel, `end by reversing the engineion one side, and going aheadionthe other, the vessel may be turned round in a space little more thanher own length. By placing the Propellers amidships, andon each side ofthe vessel, the vibration incidentto the use'of the screw-propeller isreduced very considerably, and an economy ofspace will be effected. Whenthewind is fair the propellers may be raised from-thc water, and the useof the steam-power be discontinued. I i

As I propose to employ, for the 'purpose of working Vthe auxiliaryscrewpropellers, steam-engines of but smallsize and little weight,running at a suitably high speed, so `as to actuate the propellers asdirectly as possible, and without the intervention lofheavy, expensive,and complex gearing,- I am, by the arrangement and disposition of partsof the machinery and gearing herein `described'and illustrated, enabledto contri-ve and utilize, in the same-engines, severalfunctions besidesthat of engines lfor `propulsion (as auxiliary engines) whilst at sea,when in'a calm, or with lighter adverse winds, those of actuatingsteam-Winches, steam-cranes, steam-derricli gear, or other forms ofsteam-apparatus for loading or unloading cargoi also for actuatingfireengines, or other water-pumping apparatus, and performing other workin and about a ship.

In thc accompanying drawings, Ihave merely shown ,the general characterof the auxiliary propellingapparatus, and the-principal featuresthereof, without attempting to elaborate the plans or means fdractuating or giving motion to the propelling-apparatus, or showing thevarious modes of construction and arrangements cf'parts, which it mightberequisite er necessary to adopt'rto'suit the particular requirementsof cach ship, ol the existing arrangements of her bulk-heads, or h'erinternal construction or fittings, but in every-case, njh'lss the powerand disposition of the steam-engines or boilers, 'and gearing foractuating the propellers, are to be primarily determined with referenceto the auxiliary propulsion of the ship.4 I

-The further object which I seelrto carry out, when putting my inventioninto practical use,`is to so arrange und dispose themotive-powerapparatus as to'utilize itifor other purposes, ashereinbefore stated.

The several 'figures show tliei'n'nde -of applying the apparatus inaccordance with my invention, wherein 'the iron framing containing ascrew-propeller is shown as 'hinged to the ships side, and suspendedfroma davit by means o f asuitable Vtacklefrotary motion 'being given to'the screw-propeller-by means of anendless chain passing over apitch-wheelwithin board,`and a corresponding wheel upon the, axis orshort shaft of the screw'.

The screw is mounted -between the jawsof the hinged lframe, and suitablecollars and bosses are provided, for receiving-and `resisting the thrustofthe screw. vThe frame is capable of being raised out of the water bymeans of the (invit-tackle, so'that when the shipis required to be'under canvas alone, the frame and screw beingraised, oier no impedimentto' theships sailing.V A l l In the several views, A is the ship; B, thescrew-propeller; C,lthe frame; D, the chainiwheel, ittedupon thescrewpropeller; E, the endless chain F, the chain-wheel, fitted withinthe ship, by means of which motion is transmitted to the screw-propellerwhilst inuse. A boxing, G, is shown, in which the chain-wheel connectedwith the motive-power is fitted, and by means of which boxingtheopenings left in the side of the ship for the :passage of the chain areenclosed. H is an iron bow, for connecting the-chain or rope from thedavit tothe hinged frame; I isfthe suspendingrope or chain, and K thedavit.

Motionmay be given'to therpropller itted in each side of the ship, bymeans oflseparate and independent steam-engines, moving at asuitablyhighspeed, and operating the chain-pulley contained within the boxing orl water-tight casing, directly, by means` of a. crank at each endof thepulley-shaft, euch crank being set at a proper angle, and the diametersof the two chaiu-pulleys lmay be of different sizes, to give therequisite speed to the propeller.

Instead of mounting two small vertical or angularly-placedsteam-engines, one on each side of the boxing G, a pair'l of smallengines 'may beitted to the ships side, or under or on the-deck, and thedouble crank-shaft thereof be coupled to-he en'd of/thechain-pulleyshaft, projecting on one ,sideq through the boxing. I

Whenifoundto he more convenient, 'one-pair of engines, of larger 'sizeand power, may be placed 'between lthe port and starboard propellers,and the-motion thereof be communicated, either by means ofishafts and"wheel-gearing, or by chains and.chain-wheels.l Instead of employingchain-wheels and endless pitch or other forms of chains for connectingthe inboard gearing with, the ovcrhanging screwpropeller, for thepurpose of rotating it, wheel-gearing and shaiting may be substituted.

The hinged frames'for containing the screw-Propellers, ln'steadr ofbeing ofthe form and construction shown inthe various figures of theaccompanying drawing, and mounted or hung fromthe side of the vessel, astherein shown, may be soformed as to arch over from the ships sides,(instead ofprojecting-therefrom in a'straight or` nearly' straight1ine,) and so admit of any desired'. arrangementof staying or trussing,without interfering, by the exposed surface'thereoi, with the motion ofthe ship throughthe water whilst under steam.v

Byprefernce, I propose'to place the steam-engines 'and boilers as nearas may'beconvenient to'thepro v pellets placed on each side ofthe-vessel amidships, as thereby the various mechanicalcontrivanc'es'for .eargol working, pumping, capsta'nandw'indlass-workiug, und other purposes, may be morereadily connected,set 4in Amotion, and-worked, so that when thesteam-engines arenot-required to be solely or entirely` employed in propelling, they maybused for other purposes whilst at sea, and when the ship is in harborthe engines maybe employed .for cargo-tuovingandother' purposes..

Figsul, 3, and 4,!exhibt the invention-when the chainLbelt is employed.for-"connecting the propellcrwithz the. in'board-wheel- F, but 'at fig.Zthe propeller-shaft is formed with a' crank, c, and is driven by alconnecting? rod, kb, having a hoop, c, which 'tsjin' an eccentric, d,the centre of the shaft e of the said eccentric-being eoinf cident withthe-centre upon which the hinged lframeJ C vihrates, so that it will bepossible tn raise orlower the propeller-while connected by a rigidrod. Y4

The shaft e is provided with a crank, f, by which it is 'connectedv withthe'power in-the ship, orfor the crank u. belt-wheel or pulley ortoothed wheel may be substituted, as vwill be obvious.

I claim as new, and desire to secure by Letters Patent 1 The applicationof. thehelical `Propellers B Bte the sides of a vessel, by vmeansof ahinged fraaie; C C, in

combination' with a suitable mechanism for actuating said propellers,the latter having no' conuectionffwith the vessel below the water-line,and the entire apparatus being made capable of being elevatedand turnedupagainst` the side of the vessel, and out of water when not requiredfor'use, substantially as and for the purpose specified.

` The abovespeciication of my invention signed byme, this 9th day ofMarch, 1868, Y

v l -`ROBERT ATKIN. Witnesses:'

ALEX. F.,`Rqums, WM. F. McNamara.

